United States. Department of State. Division of Map Intelligence and Cartography. North Decimal Degree 90.000000. South Decimal Degree -90.0000. East Decimal Degree 180.0000. West Decimal Degree -180.0000. Sinusoidal projection. Shows: iron ore deposits, actual reserves, estimated reserves, reserves under 10,000,000 tons (actual and/or estimated), international boundaries (1937). Map no. 10644 March 1947. G.P.O. - Department of State Service Office.